DEXTER star JAMES REMAR played a real life hero last week (ends12Aug12) when he went to the rescue of an injured homeless man.The actor spotted the man outside a grocery store in Los Angeles on Friday (10Aug12), so he went into the shop and bought bandages and antiseptic cream.Remar, who formerly worked as an Emergency

"Dexter" star James Remar is a real life good Samaritan ... rushing to the aid of a homeless man who had a massive, bloody head wound ... and TMZ has the photo evidence. We spoke with an eye-witness who saw Remar approach the man outside of an L.A.…